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Sagot :

AYUDA

vous savez que g(x) = -2x = -2 * x

donc que g(-1/2) = -2 * (-1/2) = +1

et si g(x) = -20

alors - 2 * x = -20 => x = -20 / (-2) = 10

=> g(10)= - 20

vous trouvez aussi x pour que g(x) = 10

et

h(x) = 1/4x = 1/4 * x

si x = 1/4 => h(1/4) = 1/4 * 1/4 = 1/16

si x = 8 => h(8) = 1/4 * 8 = ...

et si h(x) = 3/4

alors 1/4 * x = 3/4

donc x = 3/4 / (1/4) = 3/4 * 4 = 3

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